YOU SAID:
Everyone thinks chickens are birds but they are chickens
INTO JAPANESE
誰もがニワトリは鳥だと思っているが、彼らはニワトリだ
BACK INTO ENGLISH
Everyone thinks chickens are birds, but they are chickens.
INTO JAPANESE
誰もがニワトリは鳥だと思っていますが、彼らはニワトリです。
BACK INTO ENGLISH
Everyone thinks chickens are birds, but they are chickens.
That didn't even make that much sense in English.